Minor changes

emulator/core/src/host/gfx.rs

@@ -1,11 +1,9 @@
-
 use std::mem;
 use std::sync::{Arc, Mutex};
 
+use crate::host::traits::{BlitableSurface, ClockedQueue, WindowUpdater};
 use crate::Clock;
 use crate::Error;
-use crate::host::traits::{WindowUpdater, BlitableSurface, ClockedQueue};
-
 
 pub const MASK_COLOUR: u32 = 0xFFFFFFFF;
 
@@ -18,7 +16,11 @@ pub struct Frame {
 
 impl Frame {
     pub fn new(width: u32, height: u32) -> Self {
-        Self { width, height, bitmap: vec![0; (width * height) as usize] }
+        Self {
+            width,
+            height,
+            bitmap: vec![0; (width * height) as usize],
+        }
     }
 
     pub fn new_shared(width: u32, height: u32) -> Arc<Mutex<Frame>> {
@@ -26,7 +28,6 @@ impl Frame {
     }
 }
 
-
 impl BlitableSurface for Frame {
     fn set_size(&mut self, width: u32, height: u32) {
         self.width = width;
@@ -36,21 +37,37 @@ impl BlitableSurface for Frame {
 
     fn set_pixel(&mut self, pos_x: u32, pos_y: u32, pixel: u32) {
         match pixel {
-            MASK_COLOUR => { },
+            MASK_COLOUR => {}
             value if pos_x < self.width && pos_y < self.height => {
                 self.bitmap[(pos_x + (pos_y * self.width)) as usize] = value;
-            },
-            _ => { },
+            }
+            _ => {}
         }
     }
 
-    fn blit<B: Iterator<Item=u32>>(&mut self, pos_x: u32, pos_y: u32, mut bitmap: B, width: u32, height: u32) {
+    fn blit<B: Iterator<Item = u32>>(&mut self, pos_x: u32, pos_y: u32, mut bitmap: B, width: u32, height: u32) {
+        /*
+                (pos_y..(pos_y + height))
+                    .for_each(|y| {
+                        self.bitmap[(y * self.width) as usize .. (y * self.width + self.width) as usize]
+                            .iter_mut()
+                            .for_each(|pixel|
+                                match bitmap.next().unwrap() {
+                                    MASK_COLOUR => {},
+                                    value => *pixel = value,
+                                }
+                            )
+                    });
+        */
+
         for y in pos_y..(pos_y + height) {
             for x in pos_x..(pos_x + width) {
                 match bitmap.next().unwrap() {
-                    MASK_COLOUR => { },
-                    value if x < self.width && y < self.height => { self.bitmap[(x + (y * self.width)) as usize] = value; },
-                    _ => { },
+                    MASK_COLOUR => {}
+                    value if x < self.width && y < self.height => {
+                        self.bitmap[(x + (y * self.width)) as usize] = value;
+                    }
+                    _ => {}
                 }
             }
         }
@@ -58,9 +75,7 @@ impl BlitableSurface for Frame {
 
     fn clear(&mut self, value: u32) {
         let value = if value == MASK_COLOUR { 0 } else { value };
-        for i in 0..((self.width as usize) * (self.height as usize)) {
-            self.bitmap[i] = value;
-        }
+        self.bitmap.iter_mut().for_each(|pixel| *pixel = value);
     }
 }
 
@@ -106,7 +121,6 @@ impl WindowUpdater for FrameSwapper {
     }
 }
 
-
 #[derive(Clone)]
 pub struct FrameQueue {
     max_size: (u32, u32),
@@ -136,7 +150,8 @@ impl WindowUpdater for FrameQueue {
     }
 
     fn take_frame(&mut self) -> Result<Frame, Error> {
-        self.latest().map(|(_, f)| f).ok_or_else(|| Error::new("No frame available"))
+        self.latest()
+            .map(|(_, f)| f)
+            .ok_or_else(|| Error::new("No frame available"))
     }
 }
-

emulator/core/src/signals.rs

@@ -1,9 +1,10 @@
-
-use std::rc::Rc;
 use std::cell::{Cell, RefCell, RefMut};
+use std::rc::Rc;
 
 pub trait Observable<T> {
-    fn set_observer<F>(&self, f: F) where F: Fn(&T) + 'static;
+    fn set_observer<F>(&self, f: F)
+    where
+        F: Fn(&T) + 'static;
     fn notify(&self);
 }
 
@@ -16,7 +17,6 @@ type Input<T> = Signal<T>;
 #[allow(dead_code)]
 type TriState<T> = Signal<T>;
 
-
 #[derive(Clone, Debug)]
 pub struct Signal<T: Copy>(Rc<Cell<T>>);
 
@@ -34,7 +34,6 @@ impl<T: Copy> Signal<T> {
     }
 }
 
-
 #[derive(Clone, Debug)]
 pub struct EdgeSignal(Signal<bool>);
 
@@ -54,7 +53,6 @@ impl EdgeSignal {
     }
 }
 
-
 #[derive(Clone)]
 pub struct ObservableSignal<T>(Rc<RefCell<(T, Option<Box<dyn Fn(&T)>>)>>);
 
@@ -69,7 +67,10 @@ impl<T> ObservableSignal<T> {
 }
 
 impl<T> Observable<T> for ObservableSignal<T> {
-    fn set_observer<F>(&self, f: F) where F: Fn(&T) + 'static {
+    fn set_observer<F>(&self, f: F)
+    where
+        F: Fn(&T) + 'static,
+    {
         self.0.borrow_mut().1 = Some(Box::new(f));
     }
 
@@ -81,7 +82,6 @@ impl<T> Observable<T> for ObservableSignal<T> {
     }
 }
 
-
 pub struct ObservableEdgeSignal(ObservableSignal<bool>);
 
 impl ObservableEdgeSignal {
@@ -103,7 +103,10 @@ impl ObservableEdgeSignal {
 }
 
 impl Observable<bool> for ObservableEdgeSignal {
-    fn set_observer<F>(&self, f: F) where F: Fn(&bool) + 'static {
+    fn set_observer<F>(&self, f: F)
+    where
+        F: Fn(&bool) + 'static,
+    {
         self.0.set_observer(f)
     }
 
@@ -111,5 +114,3 @@ impl Observable<bool> for ObservableEdgeSignal {
         self.0.notify()
     }
 }
-
-

emulator/systems/genesis/src/peripherals/ym7101.rs

@@ -545,17 +545,17 @@ impl Ym7101State {
                 _                     => [ pixel_sprite, pixel_a,      pixel_b,      bg_colour ],
             };
 
-            for i in 0..pixels.len() {
-                if pixels[i].1 != 0 || i == pixels.len() - 1 {
-                    let mode = if pixels[i] == (3, 14) {
+            for (i, pixel) in pixels.iter().enumerate() {
+                if pixel.1 != 0 || i == pixels.len() - 1 {
+                    let mode = if *pixel == (3, 14) {
                         ColourMode::Highlight
-                    } else if (!priority_a && !priority_b) || pixels[i] == (3, 15) {
+                    } else if (!priority_a && !priority_b) || *pixel == (3, 15) {
                         ColourMode::Shadow
                     } else {
                         ColourMode::Normal
                     };
 
-                    frame.set_pixel(x as u32, y as u32, self.get_palette_colour(pixels[i].0, pixels[i].1, mode));
+                    frame.set_pixel(x as u32, y as u32, self.get_palette_colour(pixel.0, pixel.1, mode));
                     break;
                 }
             }

todo.txt

@@ -1,4 +1,7 @@
 
+* if index access always does a bounds check, you should try to convert some of the copy loops to use iterators
+  instead, such as frame updating, audio copying, etc
+
 * can you refactor the update timeout to put it in rust?  Would that make it faster? (the tricky part is the closure)
 * re-enable sound on webassembly, see if it works (it does not. Very lagged and jittery with what sounds like repeated frames)